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<meta name="twitter:description" content="commit: 每次的提交叫做一个commit 敲下git log的时候，会出现提交历史，而这些值都代表着什么意思呢？  分开解析commit后面跟着一串字符，这串字符相当于这个commit的身份证（SHA-1校验和），每个SHA-1值的重复概率非常低，因此可以用这个值来代表这个commit。通常也可以只使用这个值的前几位来代替，比如8898ee5甚至8898 HEADHEAD是指向当前工作目录下">
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        <p>commit: 每次的提交叫做一个commit</p>
<p>敲下git log的时候，会出现提交历史，而这些值都代表着什么意思呢？</p>
<p><img src="/blog/git/概念解释/image-20200508100604513.png" alt="image-20200508100604513"></p>
<h2 id="分开解析"><a href="#分开解析" class="headerlink" title="分开解析"></a>分开解析</h2><p><strong>commit</strong>后面跟着一串字符，这串字符相当于这个<strong>commit</strong>的身份证（SHA-1校验和），每个SHA-1值的重复概率非常低，因此可以用这个值来代表这个<strong>commit</strong>。通常也可以只使用这个值的前几位来代替，比如<strong>8898ee5</strong>甚至<strong>8898</strong></p>
<h3 id="HEAD"><a href="#HEAD" class="headerlink" title="HEAD"></a>HEAD</h3><p><strong>HEAD</strong>是指向当前工作目录下<strong>commit</strong>的引用，比如这个HEAD现在指向的是本地工作分支（feature/0424_yz）的最新一个<strong>commit</strong>（8898……），当你切换分支或者改变当前<strong>commit</strong>的时候，<strong>HEAD</strong>都会跟随过去，所以，你永远可以用HEAD操作当前<strong>commit</strong>。</p>
<h3 id="branch"><a href="#branch" class="headerlink" title="branch"></a>branch</h3><p>HEAD -&gt; feature/0424_yz, origin/feature/0424_yz 代表着当前工作目录的分支是feature/0424_yz。<strong>branch</strong>也是一种commit的引用，HEAD在指向branch的时候也是间接的指向了对应的commit。</p>
<p>在commit的时候，HEAD会拖着master往前进</p>
<p><img src="/blog/git/概念解释/15fd779f983c81e7.gif" alt="img"></p>
<p>当在本地clone远程仓库的时候，会把远程的<strong>master</strong> checkout 成为本地的默认分支。而在本地创建分支的时候，就会在原有的基础上出现分叉。</p>
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              <div class="post-toc-content"><ol class="nav"><li class="nav-item nav-level-2"><a class="nav-link" href="#分开解析"><span class="nav-number">1.</span> <span class="nav-text">分开解析</span></a><ol class="nav-child"><li class="nav-item nav-level-3"><a class="nav-link" href="#HEAD"><span class="nav-number">1.1.</span> <span class="nav-text">HEAD</span></a></li><li class="nav-item nav-level-3"><a class="nav-link" href="#branch"><span class="nav-number">1.2.</span> <span class="nav-text">branch</span></a></li></ol></li></ol></div>
            

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